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Title: Mechanism of gas permeation through polymer membranes. Part I. Pure gases. Comprehensive progress report. [Polybutadiene, poly(vinyl acetate), poly(methyl acrylate)]

Abstract

The objective of this study is to assess the validity of a free-volume model of gas permeation through nonporous polymer membranes. This model provides a formalism for the prediction of permeability coefficients for pure gaseous penetrants and their mixtures as a function of both pressure and temperature. Such information is of great importance for the development of new, energy-efficient membrane processes for the separation of gas mixtures. Diffusion and solubility coefficients for Ar, CO/sub 2/, CH/sub 4/, C/sub 2/H/sub 4/, C/sub 3/H/sub 8/, and SF/sub 6/ in polyethylene membranes and rods have been measured in the temperature range from 5/sup 0/ to 50/sup 0/C and at pressures up to 40 atm. under isothermal-isobaric conditions. It was found that the dependence of the diffusion and permeability coefficients on penetrant gas pressure and on temperature is satisfactorily represented by Fujita's free-volume model for the transport of small molecules in polymers and by its extension to gas permeation. The free-volume model of gas permeation relates permeability coefficients for gases in polymers to three thermodynamic variables, namely, temperature, pressure, and penetrant concentration, and to three characteristic parameters denoted A/sub d/, B/sub d/, and ..gamma... Semi-empirical correlations were developed for these parameters as a functionmore » of physicochemical properties of the penetrant and the polymer. These correlations were obeyed by the gas-polyethylene systems studied in the present work. A generalized correlation was found for B/sub d/ values of penetrants of various molecular sizes in polyethylene, polybutadiene, poly(vinyl acetate), poly(methyl acrylate), silicone rubber, and natural rubber.« less

Authors:
; ;
Publication Date:
Research Org.:
Syracuse Univ., NY (USA). Dept. of Chemical Engineering and Materials Science
OSTI Identifier:
5080529
Report Number(s):
DOE/ER/05015-4-Pt.1
ON: DE82019917
DOE Contract Number:  
AC02-78ER05015
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of document are illegible
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ARGON; DIFFUSION; SOLUBILITY; CARBON DIOXIDE; ETHYLENE; METHANE; POLYACRYLATES; PERMEABILITY; POLYESTERS; POLYETHYLENES; POLYOLEFINS; PROPANE; RUBBERS; SILICONES; SULFUR FLUORIDES; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; MATHEMATICAL MODELS; MEDIUM PRESSURE; MEDIUM TEMPERATURE; MEMBRANES; PRESSURE DEPENDENCE; RODS; TEMPERATURE DEPENDENCE; ALKANES; ALKENES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DATA; ELASTOMERS; ELEMENTS; ESTERS; FLUIDS; FLUORIDES; FLUORINE COMPOUNDS; GASES; HALIDES; HALOGEN COMPOUNDS; HYDROCARBONS; INFORMATION; NONMETALS; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXIDES; OXYGEN COMPOUNDS; POLYMERS; POLYVINYLS; RARE GASES; SILOXANES; SULFUR COMPOUNDS; 400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987); 400105 - Separation Procedures; 400201 - Chemical & Physicochemical Properties; 360404 - Materials- Polymers & Plastics- Physical Properties- (-1987)

Citation Formats

Stern, S A, Kulkarni, S S, and Mauze, G R. Mechanism of gas permeation through polymer membranes. Part I. Pure gases. Comprehensive progress report. [Polybutadiene, poly(vinyl acetate), poly(methyl acrylate)]. United States: N. p., 1982. Web.
Stern, S A, Kulkarni, S S, & Mauze, G R. Mechanism of gas permeation through polymer membranes. Part I. Pure gases. Comprehensive progress report. [Polybutadiene, poly(vinyl acetate), poly(methyl acrylate)]. United States.
Stern, S A, Kulkarni, S S, and Mauze, G R. 1982. "Mechanism of gas permeation through polymer membranes. Part I. Pure gases. Comprehensive progress report. [Polybutadiene, poly(vinyl acetate), poly(methyl acrylate)]". United States.
@article{osti_5080529,
title = {Mechanism of gas permeation through polymer membranes. Part I. Pure gases. Comprehensive progress report. [Polybutadiene, poly(vinyl acetate), poly(methyl acrylate)]},
author = {Stern, S A and Kulkarni, S S and Mauze, G R},
abstractNote = {The objective of this study is to assess the validity of a free-volume model of gas permeation through nonporous polymer membranes. This model provides a formalism for the prediction of permeability coefficients for pure gaseous penetrants and their mixtures as a function of both pressure and temperature. Such information is of great importance for the development of new, energy-efficient membrane processes for the separation of gas mixtures. Diffusion and solubility coefficients for Ar, CO/sub 2/, CH/sub 4/, C/sub 2/H/sub 4/, C/sub 3/H/sub 8/, and SF/sub 6/ in polyethylene membranes and rods have been measured in the temperature range from 5/sup 0/ to 50/sup 0/C and at pressures up to 40 atm. under isothermal-isobaric conditions. It was found that the dependence of the diffusion and permeability coefficients on penetrant gas pressure and on temperature is satisfactorily represented by Fujita's free-volume model for the transport of small molecules in polymers and by its extension to gas permeation. The free-volume model of gas permeation relates permeability coefficients for gases in polymers to three thermodynamic variables, namely, temperature, pressure, and penetrant concentration, and to three characteristic parameters denoted A/sub d/, B/sub d/, and ..gamma... Semi-empirical correlations were developed for these parameters as a function of physicochemical properties of the penetrant and the polymer. These correlations were obeyed by the gas-polyethylene systems studied in the present work. A generalized correlation was found for B/sub d/ values of penetrants of various molecular sizes in polyethylene, polybutadiene, poly(vinyl acetate), poly(methyl acrylate), silicone rubber, and natural rubber.},
doi = {},
url = {https://www.osti.gov/biblio/5080529}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {7}
}

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